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The paper analyzes the level of environmental quality of supply and demand in China from 2005 to 2014 by establishing the environmental quality index model of supply and demand based on the SAD-SAS model.Researches showed that the total amount of environmental supply and demand in China has been rising during the decade of 2005-2014,while the increasing rate of aggregate-supply curve is relatively slow and the total supply amount has been reached a maximum value (0.66) in the year of 2014.